I run smoke and love it. In our experience with the club layout, it does make a mess on the rails. No big deal, we just clean the rails a little more often. As for scent, I run models of Coal burning steamers putting out Coal scented smoke. No intention to offend, but no appologies to the offended.
It is what it is. I did goof and put coal smoke fluid in a friends engine (that only runs NADA). Won't do that again, but for my engines it's coal or nothing.
Gill